Solid Hardwood Flooring in the United States: Inventory and - - PowerPoint PPT Presentation

Solid Hardwood Flooring in the United States: Inventory and Sustainable Building Implications

Steve S. Hubbard, Patrick D. Eagan and Scott A. Bowe 3rd International Conference on Life Cycle Management Zurich, Switzerland August 29, 2007

Topics

Project Overview Objectives; Scope; System Boundary Methodology Results Lessons Learned Next Steps Questions

Project Overview

A Gate-To-Gate Life Cycle Inventory (LCI) of solid hardwood flooring in the eastern United States Part of larger initiative generating US regionally based LCI’s and life cycle assessments of wood products Conducted in accordance with ISO 14000 series standards and protocol guidelines outlined in (CORRIM 2001)

Project Overview The Consortium for Research on Renewable Industrial Materials (CORRIM):

• 1. 15 US and Canadian Research Institution members

2. Goal of developing a transparent database of information which can:

• Quantify environmental & economic impacts

associated with wood building materials from phases of planting, growing, manufacturing, construction, operational use, and demolition.

• Assist policy makers, building designers, the

general public, and manufacturers.

Project Overview CORRIM works closely with the Athena Institute

Athena Institute:

Not-for-profit providing scientific information and tools addressing the sustainability of built environments for the general public and building industry

Athena compiling database of life-cycle inventories for widely used products and processes. Currently possible to perform impact comparisons for over 1,000 building assimilations through the database.

Projected for public availability; housed at the National Renewable Energy Laboratories (NREL).

• www.nrel.gov/lci

Project Overview “Decisions that discourage the use of wood and other non-wood building products are made each day at all levels of industry and government. While many decisions may be motivated by a desire to protect the environment, individuals making these decisions may not consider the negative consequences associated with using non-wood substitutes.”

• taken from CORRIM website

(USGBC/LEEDS: wood 13 of 69 possible pts. Where does life-cycle thinking fit in?) http://www.corrim.org

Flooring Classification Face Widths

Inches (cm)

Thickness

Inches (cm) Solid Strip Hardwood 1.5 (3.81), 2.25 (5.71), 3.25 (8.25) Solid Plank Hardwood 3.0 (7.62), 8.0 (20.32) 1/3 (0.84), 1/2 (1.27) 3/4 (1.90) Most common thickness for both flooring classifications is ¾” but does range (Hosterman 2000)

Solid Hardwood Flooring Defined in Study

Note: Parquet and engineered flooring not considered in this inventory Only domestic hardwoods

Project Overview

Common U.S. domestic hardwood species for solid flooring: Red Oak, White Oak, Sugar Maple, Red Maple, Ash, Birch, Walnut, Cherry, Beech, Hickory, Pecan Red Oak nearly 70% of the market All results of this inventory are normalized to the defined functional unit of 1.0 m3 of Solid Hardwood Flooring

Study Region

North East/North Central (blue) ; Southeast (green)

Goal and Scope

The goal of this study is to satisfy the following

• bjectives:
• Develop baseline information on resource use,

energy use and generation, and emissions associated with solid hardwood flooring manufacture in the eastern United States.

• To compare baseline information for solid wood

flooring to that of substitute or alternative floor coverings derived from non- wood material inputs.

Goal and Scope Goal…

• To extend findings into opportunities for waste

reduction, improved energy and resource efficiencies, and scenario modeling.

• To furnish the inventory data to CORRIM for

that organizations use in developing cradle to grave life cycle assessments.

• To communicate the inventory findings

transparently to flooring manufacturers, policy makers, and the general public.

Goal and Scope

Scope:

• 2006 US production of solid hardwood flooring

estimated at 483.1 million ft2 (Wahlgren 2007)

• Want 20-50% of eastern production (currently

have 10 mills ~ 28% of Total US hardwood flooring production)

• Target mills are of mid to large size with

average industry technology

• Data is weight averaged and modeled using

SimaPro software version 7.0

System Boundary

B o ile r F a c ility H e a tin g ;

(re c yc le d in te rn a l w o o d res id u e i.e . s h a vin g s , s aw d u s t, trim m in g s, e d g in g s , w o o d flo u r)

Emissions Control (cyclones; bag houses) T rim m in g M o u ld in g : S id e a n d E n d M a tc h in g P a c k a g in g P la n in g R ip p in g

IN P U T S W a te r; N a tu ra l G a s ; L P G ; W o o d F u e l p u rc h a s e d D ie s e l F u e l; E le c tric ity; F u e l O il; O n site S y stem B o u n d a ry G a te-to -g ate S y stem B o u n d a ry O U T P U T E m is s io n s to A ir; L a n d ; W a te r O U T P U T C o - P ro d u c ts (w o o d w a s te s o ld ; n o t la n d fille d ) C o a tin g s ; S tra p p in g m e ta l p la s tic ; W ra p p in g O U T P U T S o lid H a rd w o o d F lo o rin g R o u g h K iln D ry H a rd w o o d L u m b e r

System Boundary

Considerations:

Kiln drying process

• mitted from gate-to-gate model (survey length;

secondary data from hardwood lumber module) will be reflected in final cradle to gate model

Pre-finishing

most mills indicate that pre-finish applications are done at separate facilities quality of current data for this process not adequate

Methodology

Primary Data Collection (CORRIM & ISO): Survey instrument (18 pp) Capturing data for materials and delivery to mill, products and co-products, energy, and emissions (reporting year 2006)

Methodology

Primary Data Collection: National Wood Flooring Association (NWFA) identified representative mid to large size flooring mills and contacts April 2007: 18 surveys sent to 10 companies with dedicated production of solid hardwood flooring (no exotic species, engineered, or parquet flooring)

Methodology

Captured Data from Completed Questionnaires: Input into excel spreadsheet Checked for outliers/agreement with similar sized mills Follow-ups for missing or suspicious data Mass basis calculations made from reported dimensions Units harmonized, weight averaged, and converted to SI units

Results

To Date: Received and managed data for 10 completed surveys ~ 28% of total US hardwood flooring production Several mills still working on survey

Model Inputs by Type for Production of 1.0 m3 of Solid Hardwood Flooring

Inputs Quantity SI Units per m3 Material Use Wood Rough Kiln Dry Hardwood Lumber 1419.74 kg Solid Hardwood Flooring 656.99 kg Wood Co-Product (Residue Sold) 762.75 kg Water From Ground 6.21 L Packaging Steel Strapping, cold rolled 0.15 kg Fuel Use Electricity Purchased 48.49 MJ Wood Hogged Fuel Wood Residue Produced On-Site 29.17 kg Wood Residue Purchased kg Fossil Natural Gas 0.89 m3 Fuel Oil #6 0.01 L On-Site Transportation Propane 0.12 L Gasoline 0.02 L Off-Road Diesel 0.27 L Emissions To Air Volatile Organic Compounds 0.002 kg Particulates, unspecified 0.01 kg Particulates <10 um 0.007 kg To Water Discharged to Sewer or Surface 0.01 L To Land Fly Ash 1.32 kg Weight averaged data from 10 mills; all data allocated by mass to production

• f 1.0 m3 hardwood flooring (OD basis 656.99 kg/ m3)

Next Steps

• 1. Receive and process anticipated surveys
• 2. Final mass balance; Weight average data;

Finalize model in SimaPro 7.0; Reports

• 3. Creation of a full cradle-to-gate LCI

(Hardwood Forest Resource to Hardwood Lumber to Solid Hardwood Flooring)

lessons learned Importance of understanding the process:

Kiln drying: significant impacts Pre-finishing: data should be captured at finishing facilities and be imported as stand alone process

Realistic level of detailed data collection in survey:

Unit process model approach shifted to black box model

Support of Industry Association:

= key to getting mills and data for a survey of this detail and time commitment

Importance of careful documentation and data management for LCI

It takes patience and time

Acknowledgements

CORRIM- technical assistance Ed Korczak (NWFA)- project promotion and support Scott Bowe, Patrick Eagan, Jim Wilson, and Richard Bergman- technical assistance and support Participating flooring mills

Questions?

Sources

Consortium for Research on Renewable Industrial Materials (CORRIM). 2001. Research Guidelines for Life Cycle Inventories. CORRIM, Inc. University of Washington, Seattle, WA. April. 47pp. Hosterman, Nathan S. 2000. A Preliminary Examination of Factors Affecting Manufacture of Value Added Products From Recycled Pallet Parts. Masters Thesis Submitted to the Virginia Polytechnic Institute and State University. 108 pp. Wahlgren, Kim M. 2007. State of the Industry: Worldly Vision. Hardwood Floors. April/May 2007. pp. 71-92.